windchills were still in the 20s as far south as atlanta and north florida. but let's get to this. the coldest air of the season so far still sitting from the midwest all the way to the northeast today. take a look at these windchills you're facing this morning. and as we show you these pictures, incredible pictures of people working in that cold air. bundled up in the cold air. mt. washington, new hampshire, an 86-degree below windchill. new york city, 2 below. now, 24 states, again today have winter weather watches, warnings or advisories. this is the coldest part of this air. and it gets better after this. but, i tell you, a lot of people have faced these cold air. and some of the folks, no one knows it better than where our alex perez is standing right now in chicago. good morning, alex. >> reporter: good morning, sam. part of the problem is how quickly everything freezes. take a look at this building. it caught fire tuesday. it rekindled wednesday. and it's transformed into a complete icebox. this morning, from the upper midwest, all the way to the east coast, deep freeze dang